Index: lib/MC/ELFObjectWriter.cpp
===================================================================
--- lib/MC/ELFObjectWriter.cpp
+++ lib/MC/ELFObjectWriter.cpp
@@ -29,6 +29,7 @@
 #include "llvm/MC/MCFixup.h"
 #include "llvm/MC/MCFixupKindInfo.h"
 #include "llvm/MC/MCFragment.h"
+#include "llvm/MC/MCObjectFileInfo.h"
 #include "llvm/MC/MCObjectWriter.h"
 #include "llvm/MC/MCSection.h"
 #include "llvm/MC/MCSectionELF.h"
@@ -1049,6 +1050,8 @@
   SectionOffsetsTy SectionOffsets;
   std::vector<MCSectionELF *> Groups;
   std::vector<MCSectionELF *> Relocations;
+  MCSectionELF *TextSection =
+      static_cast<MCSectionELF *>(Ctx.getObjectFileInfo()->getTextSection());
   for (MCSection &Sec : Asm) {
     MCSectionELF &Section = static_cast<MCSectionELF &>(Sec);
     if (Mode == NonDwoOnly && isDwoSection(Section))
@@ -1090,6 +1093,15 @@
       SectionIndexMap[RelSection] = addToSectionTable(RelSection);
       Relocations.push_back(RelSection);
     }
+
+    // For ARM, we need to add SHF_ARM_PURECODE to an empty TextSection if any
+    // other section has SHF_ARM_PURECODE.
+    if (OWriter.TargetObjectWriter->getEMachine() == ELF::EM_ARM &&
+        !TextSection->hasInstructions() &&
+        !(TextSection->getFlags() & ELF::SHF_ARM_PURECODE) &&
+        Section.getFlags() & ELF::SHF_ARM_PURECODE) {
+      TextSection->setFlags(TextSection->getFlags() | ELF::SHF_ARM_PURECODE);
+    }
   }
 
   MCSectionELF *CGProfileSection = nullptr;
Index: lib/Target/ARM/ARMTargetObjectFile.cpp
===================================================================
--- lib/Target/ARM/ARMTargetObjectFile.cpp
+++ lib/Target/ARM/ARMTargetObjectFile.cpp
@@ -32,7 +32,8 @@
                                         const TargetMachine &TM) {
   const ARMBaseTargetMachine &ARM_TM = static_cast<const ARMBaseTargetMachine &>(TM);
   bool isAAPCS_ABI = ARM_TM.TargetABI == ARMBaseTargetMachine::ARMABI::ARM_ABI_AAPCS;
-  //  genExecuteOnly = ARM_TM.getSubtargetImpl()->genExecuteOnly();
+  bool genExecuteOnly =
+      ARM_TM.getMCSubtargetInfo()->hasFeature(ARM::FeatureExecuteOnly);
 
   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
   InitializeELF(isAAPCS_ABI);
@@ -40,6 +41,17 @@
   if (isAAPCS_ABI) {
     LSDASection = nullptr;
   }
+
+  // Make code section unreadable when in execute-only mode
+  if (genExecuteOnly) {
+    unsigned Type = ELF::SHT_PROGBITS;
+    unsigned Flags =
+        ELF::SHF_EXECINSTR | ELF::SHF_ALLOC | ELF::SHF_ARM_PURECODE;
+    // Since we cannot modify flags for an existing section, we create a new
+    // section with the right flags, and use 0 as the unique ID for
+    // execute-only text
+    TextSection = Ctx.getELFSection(".text", Type, Flags, 0, "", 0U);
+  }
 }
 
 const MCExpr *ARMElfTargetObjectFile::getTTypeGlobalReference(
Index: test/MC/ARM/elf-execute-only-section.ll
===================================================================
--- /dev/null
+++ test/MC/ARM/elf-execute-only-section.ll
@@ -0,0 +1,13 @@
+; RUN: llc < %s -mtriple=thumbv8m.base-eabi -mattr=+execute-only -filetype=obj %s -o - | \
+; RUN: llvm-readelf -s | FileCheck %s
+; RUN: llc < %s -mtriple=thumbv8m.main-eabi -mattr=+execute-only -filetype=obj %s -o - | \
+; RUN: llvm-readelf -s | FileCheck %s
+; RUN: llc < %s -mtriple=thumbv7m-eabi -mattr=+execute-only -filetype=obj %s -o - | \
+; RUN: llvm-readelf -s | FileCheck %s
+
+; CHECK-NOT: {{.text[ ]+PROGBITS[ ]+[0-9]+ [0-9]+ [0-9]+ [0-9]+ AX[^p]}}
+; CHECK: {{.text[ ]+PROGBITS[ ]+[0-9]+ [0-9]+ [0-9]+ [0-9]+ AXp}}
+define void @test_func() {
+entry:
+  ret void
+}
Index: test/MC/ELF/ARM/execute-only-populated-text-section.s
===================================================================
--- /dev/null
+++ test/MC/ELF/ARM/execute-only-populated-text-section.s
@@ -0,0 +1,27 @@
+// RUN: llvm-mc -filetype=obj -triple thumbv7m-arm-linux-gnu %s -o - \
+// RUN: | llvm-readobj -s -t | FileCheck %s
+
+        .text
+        bx      lr
+
+        .section        .text.foo,"axy"
+        bx      lr
+
+// CHECK:      Section {
+// CHECK:        Name: .text
+// CHECK-NEXT:   Type: SHT_PROGBITS (0x1)
+// CHECK-NEXT:   Flags [ (0x6)
+// CHECK-NEXT:     SHF_ALLOC (0x2)
+// CHECK-NEXT:     SHF_EXECINSTR (0x4)
+// CHECK-NEXT:   ]
+// CHECK:      }
+
+// CHECK:      Section {
+// CHECK:        Name: .text.foo
+// CHECK-NEXT:   Type: SHT_PROGBITS (0x1)
+// CHECK-NEXT:   Flags [ (0x20000006)
+// CHECK-NEXT:     SHF_ALLOC (0x2)
+// CHECK-NEXT:     SHF_ARM_PURECODE (0x20000000)
+// CHECK-NEXT:     SHF_EXECINSTR (0x4)
+// CHECK-NEXT:   ]
+// CHECK:      }
Index: test/MC/ELF/ARM/execute-only-section.s
===================================================================
--- test/MC/ELF/ARM/execute-only-section.s
+++ test/MC/ELF/ARM/execute-only-section.s
@@ -20,8 +20,9 @@
 // CHECK:      Section {
 // CHECK:        Name: .text (16)
 // CHECK-NEXT:   Type: SHT_PROGBITS (0x1)
-// CHECK-NEXT:   Flags [ (0x6)
+// CHECK-NEXT:   Flags [ (0x20000006)
 // CHECK-NEXT:     SHF_ALLOC (0x2)
+// CHECK-NEXT:     SHF_ARM_PURECODE (0x20000000)
 // CHECK-NEXT:     SHF_EXECINSTR (0x4)
 // CHECK-NEXT:   ]
 // CHECK:        Size: 0